Summary
Built in 1934, this buttress dam serves the primary purpose of water supply, holding a storage capacity of 165 acre-feet. Situated on the South Branch Goose River, the dam stands at a height of 13.8 feet and spans 80 feet in length, with a surface area of 24.8 acres and a drainage area of 360 square miles.
The dam, regulated by the North Dakota State Water Commission, has a low hazard potential and is classified as not rated in terms of condition assessment. With a risk assessment rating of high (2), the structure underwent a structural modification in 1956. Despite lacking a spillway, the dam is equipped with outlet gates. The last inspection conducted on the site was in May 2016, with a scheduled inspection frequency that ensures its operational integrity for water supply in the region.
Portland Dam's presence on the South Branch Goose River ensures a reliable water source for the local community, with the potential for risk management measures to be implemented to enhance its safety and efficiency as a crucial infrastructure for water supply in Traill County, North Dakota.
Years Modified |
1956 - Structural |
Year Completed |
1934 |
Dam Length |
80 |
Dam Height |
13.8 |
River Or Stream |
SOUTH BRANCH GOOSE RIVER |
Primary Dam Type |
Buttress |
Surface Area |
24.8 |
Drainage Area |
360 |
Nid Storage |
165 |
Structural Height |
14 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Goose River Near Portland
|
18cfs |
Goose River At Hillsboro
|
27cfs |
Maple River Nr Hope
|
0cfs |
Red River Of The North Near Thompson
|
1020cfs |
Red River Of The North At Halstad
|
810cfs |
Sand Hill River At Climax
|
36cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Portland Dam